{
  "origin": "Experiment-authored plain text, no external corpus; fixed before functional metrics. Chinese/English balanced in each split. No chat template. First 32 tokenizer tokens retained.",
  "samples": [
    {"id":"cal-zh-1","split":"calibration","language":"zh","text":"清晨，研究员打开实验记录本，检查昨天保存的数据。他先确认文件完整，再比较两组观测结果。为了避免偶然误差，他为每一步留下时间和条件，并将尚未验证的推测单独记录。"},
    {"id":"cal-zh-2","split":"calibration","language":"zh","text":"一辆列车从山间驶向海边，经过村庄、桥梁和开阔的田野。旅客望着窗外变化的景色，计划抵达后先步行到旅馆，再去市场购买晚餐需要的食材。天气预报说傍晚可能下雨。"},
    {"id":"cal-en-1","split":"calibration","language":"en","text":"A small library opens every morning beside the river. The librarian checks returned books, repairs damaged covers, and places new arrivals on a wooden table. Visitors often stop to read before continuing their journey across the old bridge."},
    {"id":"cal-en-2","split":"calibration","language":"en","text":"To compare two measurements, first record their units and the conditions under which they were collected. Compute the difference, inspect unusual observations, and repeat the procedure with independent examples. A short report should separate observations from explanations and unresolved questions."},
    {"id":"test-zh-1","split":"heldout","language":"zh","text":"午后，工程师检查温室中的传感器。温度记录出现一个异常值，她没有立刻删除，而是查看设备状态并补做一次测量。确认原因以后，她调整了采样计划，在报告中说明这次变化。"},
    {"id":"test-zh-2","split":"heldout","language":"zh","text":"周末，家人沿着湖边的小路散步。他们带了水和简单的午餐，打算在树林旁休息。途中遇到一处正在维修的桥，于是参考路标选择另一条道路，终于在日落前回到车站。"},
    {"id":"test-en-1","split":"heldout","language":"en","text":"The gardener planted several rows of beans behind the house. Each evening she checked the soil and wrote down how much water the plants received. After a week of warm weather, the first green shoots appeared near the fence beside the apple tree."},
    {"id":"test-en-2","split":"heldout","language":"en","text":"When a program reads a table, it should check column names and handle missing entries explicitly. The developer tested a small example, compared the output with a hand calculation, and saved the input alongside the result so another person could reproduce the check."}
  ]
}